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See detailDual-Role Factors for Imprecise Data Envelopment Analysis
Hatami Marbini, Adel ULiege

Conference (2017, July 17)

In conventional data envelopment analysis (DEA), the observed inputs, outputs and dual-factors are assumed to be precise. However, we often observe imprecise and ambiguous data in practice. In this paper ... [more ▼]

In conventional data envelopment analysis (DEA), the observed inputs, outputs and dual-factors are assumed to be precise. However, we often observe imprecise and ambiguous data in practice. In this paper, we present an imprecise DEA model in the presence of dual-role factors to deal with the imprecise data. The resulting models are the mixed binary integer programming models that supply the best possible relative efficiencies from the optimistic and pessimistic viewpoints. After some theoretical discussions, the proposed models are illustrated with a numerical example. [less ▲]

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See detailProtein-polysaccharide complexes for improved protein delivery within CaCO3 microparticles
Ramalapa, Bathabile ULiege; Crasson, Oscar ULiege; Vandevenne, Marylène ULiege et al

Conference (2017, July 17)

Introduction: The controlled delivery of proteins within calcium carbonate (CaCO3) particles is currently widely investigated due to accessibility, low cost, safety, pH-sensitive properties, high surface ... [more ▼]

Introduction: The controlled delivery of proteins within calcium carbonate (CaCO3) particles is currently widely investigated due to accessibility, low cost, safety, pH-sensitive properties, high surface area and high porosity. The success of these carriers has been driven by the ionic interactions between proteins and particles making the encapsulation of proteins highly dependent on the pH of reaction solutions and the isoelectric point of the protein. This poses a great limitation on the successful loading of proteins into microparticles. In this study we explored the use of polysaccharide-protein complexes to enhance the encapsulation of otherwise poorly encapsulated proteins in CaCO3 microparticles. Methods: A chitin binding domain (ChBD) was inserted on the protein β-lactamase to form a chimeric protein. A protein-polysaccharide complex was formed between the protein and hyaluronic acid (HA) owing to the intrinsic affinity of the ChBD to HA. The chimeric protein was then loaded into CaCO3 microparticles using super critical CO2 technology aided by the templating effect of HA on CaCO3. The microparticles were characterised for size, surface charge, polymorphism and protein loading. Bioactivity and stability of the encapsulated β-lactamase was characterised by kinetic reaction with nitrocefin. A thrombin cleavage site was inserted onto the gene sequence of the protein to achieve release of the protein from the microparticles by proteases mediation using thrombin. Results: Vaterite CaCO3 microparticles of sizes ranging between 6 and 8 µm were produced. The presence of the ChBD on the β-lactamase increased the encapsulation of the protein by 6 fold when complexed with HA. Thrombin mediated release increased the release of the protein from the microparticles within 36 hours from <25% to 87%. The protein-polysaccharide complex demonstrated success in encapsulation of the protein while retaining up to 81% activity of the protein and allowing controlled release by proteases. Conclusion: Protein-polysaccharide complexation demonstrates an excellent approach for the delivery of sensitive biomacromolecules which can otherwise be complicated due to electrostatic hindrances. Future prospects include using the methods we have developed for encapsulation of therapeutic proteins and using calcium carbonate as a carrier and scaffold for example in bone regeneration. [less ▲]

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See detailPrevention Library and Resources in four languages (QP Library)
Comité de Bibliografía en Prevención Cuaternaria; WONCA SIG P4 & O; Pizanelli, Miguel et al

Textual, factual or bibliographical database (2017)

Since Quaternary Prevention is very extensive and complex, during the design process for database input, an indexing structure with the use of coding tools and categories was considered. This design will ... [more ▼]

Since Quaternary Prevention is very extensive and complex, during the design process for database input, an indexing structure with the use of coding tools and categories was considered. This design will allow the addition of materials and will provide easy access to them. To add documents, 13 data fields must be populated. To access the input data form, for the purpose of adding documents, use this link: http://j.tinyurl.com/P4-Library To avoid duplication of data entries, it is necessary to review and perform an audit. In the beginning, we will provide this tutorial to a few data entry collaborators. To become a data entry collaborator, please send an e-mail to the following address: quaternaryprevention@gmail.com Charts are available in eight languages to code with Q-Codes: http://3cgp.docpatient.net/tabular/ [less ▲]

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See detailGlobal regression model for moisture content determination using near-infrared spectroscopy
Clavaud, Matthieu ULiege; Roggo, Yves; Degardin, Klara et al

in European Journal of Pharmaceutics and Biopharmaceutics (2017), 119

Near-infrared (NIR) global quantitative models were evaluated for the moisture content (MC) determination of three different freeze-dried drug products. The quantitative models were based on 3822 spectra ... [more ▼]

Near-infrared (NIR) global quantitative models were evaluated for the moisture content (MC) determination of three different freeze-dried drug products. The quantitative models were based on 3822 spectra measured on two identical spectrometers to include variability. The MC, measured with the reference Karl Fischer (KF) method, were ranged from 0.05% to 4.96%. Linear and non-linear regression models using Partial Least Square (PLS), Decision Tree (DT), Bayesian Ridge Regression (Bayes-RR), K-Nearest Neighbors (KNN), and Support Vector Regression (SVR) algorithms were created and evaluated. Among them, the SVR model was retained for a global application. The Standard Error of Calibration (SEC) and the Standard Error of Prediction (SEP) were respectively 0.12% and 0.15%. This model was then evaluated in terms of total error and risk-based assessment, linearity, and accuracy. It was observed that MC can be fastly and simultaneously determined in freeze-dried pharmaceutical products thanks to a global NIR model created with different medicines. This innovative approach allows to speed up the validation time and the in-lab release analyses. [less ▲]

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See detailEffects of an experimental resource pulse on the macrofaunal assemblage inhabiting seagrass macrophytodetritus
Remy, François ULiege; Gobert, Sylvie ULiege; Lepoint, Gilles ULiege

in Belgian Journal of Zoology (2017), 147(1), 1-15

Physical disturbances and resource pulses are major structuring drivers of terrestrial and aquatic ecosystems. The accumulations of exported dead leaves from the Neptune grass, Posidonia oceanica (L ... [more ▼]

Physical disturbances and resource pulses are major structuring drivers of terrestrial and aquatic ecosystems. The accumulations of exported dead leaves from the Neptune grass, Posidonia oceanica (L.) Delile are ephemeral and highly dynamic detrital habitats offering food sources and shelter for vagile macrofauna community. These habitats are frequently subject to wind and storms which can add “new” detrital material to previous accumulations; these can be defined as resource pulses and could potentially impact the associated macrofauna. This study assesses the impact of an experimental resource pulse on the macrofauna associated with exported P. oceanica litter accumulations. The experimental design consisted of two pulse treatments (the addition of dead leaves with and without the associated fauna), and two controls (one procedural, and one total control), where the added material was left underwater for 14 days. Invertebrates then present in the sampled detritus were all identified and counted. Our data suggest that the responses of these invertebrates to resource pulses present intermediate characteristics between aquatic and terrestrial ecosystems responses. Inputting a moderate amount of dead P. oceanica leaves into experimental mesocosms had a non-negligible impact and rapidly affected the macrofauna community. Specialist detritivores species were boosted while herbivore/detritivore species dramatically decreased. Predators also showed a modest but significant density increase, demonstrating the fast propagation of the pulse response throughout the entire community and through several trophic levels. Strict hypoxia-tolerant species were also only observed in the treated mesocosms, indicating the strong influence of resource pulses on physico-chemical conditions occurring inside litter accumulations. [less ▲]

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See detailCosmological Time, Entropy and Infinity
Hauret, Clémentine ULiege; Magain, Pierre ULiege; Biernaux, Judith ULiege

in Entropy (2017), 19(7),

Time is a parameter playing a central role in our most fundamental modelling of natural laws. Relativity theory shows that the comparison of times measured by different clocks depends on their relative ... [more ▼]

Time is a parameter playing a central role in our most fundamental modelling of natural laws. Relativity theory shows that the comparison of times measured by different clocks depends on their relative motion and on the strength of the gravitational field in which they are embedded. In standard cosmology, the time parameter is the one measured by fundamental clocks (i.e., clocks at rest with respect to the expanding space). This proper time is assumed to flow at a constant rate throughout the whole history of the universe. We make the alternative hypothesis that the rate at which the cosmological time flows depends on the dynamical state of the universe. In thermodynamics, the arrow of time is strongly related to the second law, which states that the entropy of an isolated system will always increase with time or, at best, stay constant. Hence, we assume that the time measured by fundamental clocks is proportional to the entropy of the region of the universe that is causally connected to them. Under that simple assumption, we find it possible to build toy cosmological models that present an acceleration of their expansion without any need for dark energy while being spatially closed and finite, avoiding the need to deal with infinite values. [less ▲]

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See detailRegression analysis of potato dormancy integrating genetic and environmental factors.
Visse-Mansiaux, Margot ULiege; Vanderschuren, Hervé ULiege; Soyeurt, Hélène ULiege et al

Conference (2017, July 14)

Potato dormancy is usually described as the period required by potato tubers to initiate sprouting after harvest. The dormancy parameter is key for the potato value chain because it defines the storage ... [more ▼]

Potato dormancy is usually described as the period required by potato tubers to initiate sprouting after harvest. The dormancy parameter is key for the potato value chain because it defines the storage period during which no anti-sprouting treatment is required. Dormancy is known to have a genetic component because the time from harvest to sprouting varies between potato varieties. A better characterization of dormancy helps optimizing storage by reducing the frequency of anti-sprouting applications. Reducing the anti-sprouting treatments not only helps lowering storage costs but it also provides an immediate benefit for human health and for the environment. The main objective of the present study is to develop a model predicting the dormancy length in function of the cultivar and the growing conditions of the considered year. So, 2 sources of informations were used: 1) average dormancy of cultivars provided by breeders (breeders dormancy) 2) average dormancy of cultivars obtained from field experiments (field dormancy). The field experiments were managed in Switzerland during 25 years in four different locations and for 721 varieties of potatoes. Field data were registered during the growing season such as weather data (e.g. temperature, rainfall etc.), soil data and crop management data. One month after harvest, the potatoes were stored at 8°C in wooden crates containing 7 kg of potato tubers. The dormancy was defined as the time between the harvest and the emergence of the first sprouts. The data (n=3’730) were analyzed as follow: (1) calculation of the field dormancy, which is the average dormancy length of the tested cultivars from the field data; (2) merging of field dormancy and breeders dormancy records (3) univariate regressions to study the link between the breeders and field dormancy records; (3) ANOVA to identify the parameters with the highest influence on the dormancy length; (4) creation of a model using these identified parameters in order to predict the sprouting date of potato stocks based on the field data; (5) validation of the model. Our results highlight the heterogeneity of the dormancy data provided by the potato breeders. Our results also stress the importance of climatic and field parameters to estimate the dormancy length of a given potato stock. We discuss the practical consequences for growers and potato storage companies. [less ▲]

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See detailAir-water interfacial properties of enzymatically hydrolyzed wheat gluten in the presence of sucrose
Wouters, Arno G.B.; Fierens, Ellen; Rombouts, Ine et al

in Food Hydrocolloids (2017), (73), 284-294

Enzymatically hydrolyzed wheat gluten proteins may be a valuable alternative to animal proteins as foaming agents in food. Studies of the air-water (A-W) interfacial properties of such hydrolysates in ... [more ▼]

Enzymatically hydrolyzed wheat gluten proteins may be a valuable alternative to animal proteins as foaming agents in food. Studies of the air-water (A-W) interfacial properties of such hydrolysates in aqueous solutions contribute to the understanding of their functionality in food systems. We here studied the A-W interfacial characteristics of wheat gluten hydrolysates (GHs) in the absence and presence of sucrose. Sucrose increased (P < 0.05) the foaming capacity, which is the initial amount of foam formed, of GHs. This is probably related to an increased affinity of GHs for the A-W interface in the presence of sucrose, as could be observed by higher (P < 0.05) rates of diffusion to and adsorption at the A-W interface of the GH constituents in sucrose solution compared to those in water. Furthermore, the surface dilatational moduli of GH protein films at A-Winterfaces were in most cases higher (P < 0.05) in a sucrose solution than in water. The latter could only partly be related to differences in foam stability. Surface hydrophobicity and intrinsic tryptophan fluorescence measurements revealed that protein conformational changes in the presence of sucrose might be at the basis of the observed differences. Another possibility is that the hydrophilic sucrose molecules in the bulk cause the more hydrophobic protein molecules to concentrate at the interface, more so than in water. In conclusion, it is crucial to investigate the foaming of plant protein hydrolysates in media more complex than water, as other nonsurface-active food ingredients alter their interfacial behavior. [less ▲]

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See detailA Novel Accelerometer-Based Method for Stride Length Estimation
Boutaayamou, Mohamed ULiege; Schwartz, Cédric ULiege; Denoël, Vincent ULiege et al

Poster (2017, July 14)

We demonstrate the feasibility of accurately and precisely estimating the left/right average stride length from measured heel/toe accelerations in the gait of healthy, old adults. Our approach relies on ... [more ▼]

We demonstrate the feasibility of accurately and precisely estimating the left/right average stride length from measured heel/toe accelerations in the gait of healthy, old adults. Our approach relies on (1) a novel method that uses only accelerometer data without the need of additional data from, e.g., gyroscopes and/or magnetometers, and on (2) the validation of the results using reference 3D optoelectronic system data. [less ▲]

Detailed reference viewed: 43 (10 ULiège)
See detail“Moving on metaphorical silk roads of intellectual trade”: Chinese encounters in Gail Jones’s writing
Belleflamme, Valérie-Anne ULiege

Scientific conference (2017, July 14)

In 2008, Australian fiction writer and essayist Gail Jones spent four months in Shanghai as a guest of the Chinese and Shanghai Writers Associations. During this time, two of her earlier novels were ... [more ▼]

In 2008, Australian fiction writer and essayist Gail Jones spent four months in Shanghai as a guest of the Chinese and Shanghai Writers Associations. During this time, two of her earlier novels were published in Chinese. Although a non-sinologist, Jones has shown an interest in China, and more generally in Asianness, from her childhood onwards, which she spent on the outskirts of Broome, a small town whose majority population was Chinese, Japanese, Malay, Filipino and Aboriginal. Consequently, as she claims in her essay “‘I am Chinese’: Of Bodies and Walls, Of Boundaries and their Dissolution” (2016), in which she critically assesses her own writing – “not to suggest equal status or literary parity, of course, but because tropes of perspective, walls, and bodies are a remarkably beguiling connection between writers and artists looking from the outside to China” (Jones 2016, 87) –, she “saw and experienced the deep appeal of an Asian-indigenous multiculture” (Jones 2016, 88), and her fiction “tends to narrate cross-cultural encounters, often thematising ignorance or cultural misunderstanding”. Engaging with her sinophile fiction (Five Bells, “Touching Tiananmen”) and non-fiction (“‘I am Chinese’: Of Bodies and Walls, Of Boundaries and their Dissolution”), my paper will investigate how, both metaphorically and metadiscursively, Jones crafts Chinese aesthetics in an Australian space and cultivates cross-cultural encounters between characters and readers alike, as “the task of writers and scholars is […] to address the gaps, to mount tiny incursions, to find those narratives that heaven cannot quite cover over” (Jones 2016, 91). Works Cited Jones, Gail. 2000. “Touching Tiananmen,” The House of Breathing: Stories by Gail Jones. New York: George Braziller. Pp. 130-139. Jones, Gail. 2011. Five Bells. London: Vintage. Jones, Gail. 2016. “‘I am Chinese’: Of Bodies and Walls, Of Boundaries and their Dissolution,” Moving Worlds: A Journal of Transcultural Writings 16(2): 80-108. [less ▲]

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See detailAn active bacterial community linked to high chl-a concentrations in Antarctic winter-pack ice and evidence for the development of an anaerobic sea-ice bacterial community
Eronen-Rasimus, Eeva; Luhtanen, Anne-Mari; Rintala, Janne-Markus et al

in ISME Journal (The) (2017), 1-11

Antarctic sea-ice bacterial community composition and dynamics in various developmental stages were investigated during the austral winter in 2013. Thick snow cover likely insulated the ice, leading to ... [more ▼]

Antarctic sea-ice bacterial community composition and dynamics in various developmental stages were investigated during the austral winter in 2013. Thick snow cover likely insulated the ice, leading to high (o4 μg l–1) chlorophyll-a (chl-a) concentrations and consequent bacterial production. Typical sea-ice bacterial genera, for example, Octadecabacter, Polaribacter and Glaciecola, often abundant in spring and summer during the sea-ice algal bloom, predominated in the communities. The variability in bacterial community composition in the different ice types was mainly explained by the chl-a concentrations, suggesting that as in spring and summer sea ice, the sea-ice bacteria and algae may also be coupled during the Antarctic winter. Coupling between the bacterial community and sea-ice algae was further supported by significant correlations between bacterial abundance and production with chl-a. In addition, sulphate-reducing bacteria (for example, Desulforhopalus) together with odour of H2S were observed in thick, apparently anoxic ice, suggesting that the development of the anaerobic bacterial community may occur in sea ice under suitable conditions. In all, the results show that bacterial community in Antarctic sea ice can stay active throughout the winter period and thus possible future warming of sea ice and consequent increase in bacterial production may lead to changes in bacteria-mediated processes in the Antarctic sea-ice zone. [less ▲]

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See detailUndoing Art
Delville, Michel ULiege

Conference (2017, July 13)

Detailed reference viewed: 28 (4 ULiège)
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See detailLife cycle in practice - How to help SMEs to integrate life cycle thinking concept?
Groslambert, Sylvie ULiege

Conference (2017, July 13)

Context The application of Life Cycle Approaches – including Life Cycle Assessment, eco-design and environmental labelling – is becoming an increasing reality for business, and a growing challenge in many ... [more ▼]

Context The application of Life Cycle Approaches – including Life Cycle Assessment, eco-design and environmental labelling – is becoming an increasing reality for business, and a growing challenge in many economic sectors. Businesses are facing increasing legal and market requirements to enhance resource efficiency and reduce the environmental impact of their products & services. To significantly address this challenge, the Life Cycle in Practice project (LCiP - LIFE12 ENV/FR/001113) was conceived, aiming to promote the uptake of LC approaches particularly in SMEs. This project is co-financed by the LIFE Program + Policy and Governance on the theme of the environment of the European Un-ion, supporting technological projects with significant environmental impacts. Project The overall aim of the LCiP project is to help SMEs in France, Belgium, Portugal and Spain in reducing the environmental impacts of their products and services across the entire Life Cycle and to foster the implementation of circular economy in these regions. Three sectors are selected: Buildings & Construction, Waste Management and Energy Equipment. Thirty-two businesses are involved in the four regions, twelve being located in Wallonia. The Competition Clusters GreenWin is the Walloon partner, and it has man-dated several teams well known for their expertise in LCA to coach them Results ULg-PEPs coached three SMS's to help them to carry out the Life Cycle Assessment (LCA) of their product and accordingly to identify the strengths and weakness of the products and/or processes. Two of them are involved in building insulation (hemp con-crete blocs from IsoHemp and sound insulation panels Acoustix made by Pan-Terre), and the third one is developing an accelerated composting equipment for food waste (Eco-Cleaner). Concretely, the LCA of the three products are realised in a cradle to gate perspective. The results show possible environmental impact improvement for all the products, even if they are eco-designed. As a coach, the experience of working closely with highly motivated people in small structures is very gratifying and a smart way to help life cycle approaches to develop in our region. We are pleased to go on this initiative by hosting one of the Physical Resource Cen-tres in the University of Liège to welcome SMEs seeking to integrate LC approaches into their businesses, and give them access to selected LCA tools, reading material, expertise, training and advice. Results and Online Resource Center are centralised on the LCiP website: http://www.lifelcip.eu/ [less ▲]

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See detailHighly efficient doped nanocristalline TiO2 for water Treatment
Mahy, Julien ULiege; Léonard, Géraldine ULiege; Zubiaur, Anthony ULiege et al

Conference (2017, July 13)

Detailed reference viewed: 37 (9 ULiège)